JPS59155629A - Torsional vibration damper particularly for automobile, particularly, friction clutch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention generally comprises at least two coaxial sections;
These coaxial parts are mounted so as to be rotatable relative to each other within the limits of a predetermined angular deviation, against elastic means circumferentially interposed therebetween, i.e., circumferentially acting elastic means. This invention relates to a screw vibration damping device of the type described above.

゛...This type of screw vibration damping device is commonly used, especially in the structure of friction clutches in automobiles, in which case one coaxial portion is connected to the first shaft, in fact the driving oil, in the case of automobiles, the engine. A friction disk rotatably integrated with the output shaft is supported, and one part is called a biasing coaxial part in this specification, and the other same width part is a second thin part,
In practice, it is supported by a hub that is rotatably integrated with the driven shaft, or in the case of an automobile, the input shaft of a transmission gear, forming what is referred to herein as a biased coaxial part. According to such a screw vibration damping device, the rotational torque applied to one coaxial part is transmitted in a controlled manner when the other coaxial part itself is subjected to rotational torque, i.e. in the case of an automobile. Vibrations that may occur along the dynamic chain K from the engine to the axle (the torsional vibration damper is arranged in this chain) are eliminated.

Circumferentially acting elastic means interposed circumferentially between the biasing coaxial part and the biasing coaxial part are often
It has a plurality of elastic members, each of which extends substantially tangentially to the circumference of the device part, and some of which are each individually inserted into a recess formed therefor in the coaxial part to be biased. A portion is accommodated in a receptacle formed for this purpose in the biased coaxial part.

The elastic member used in this way is often a coil spring type spring.

However, it has been proposed to use blocks made of elastic material in place of or in conjunction with at least some of these springs.

This is described, for example, in French Patent Application No. 82-2054 (filing date: February 9, 1982).

In any case, the stiffness of the circumferentially acting elastic means is modulated as a function of the angular deflection between the biasing and biased coaxial parts and is adjusted as required according to the requirements at the time. In order to better adapt parts of the device to a particular door opening, the elastic members forming the circumferentially acting elastic means are usually distributed in at least two stages or groups and are arranged in such a way as to avoid angular deviations. The start of action of at least one group or stage is differentiated during the operation.

For this purpose, in the rest state of the device part, all the used elastic members are normally delivered without circumferential play into the storage parts of the biasing coaxial parts, but there is a difference in the start of their action. The elastic member to be applied is arranged in the corresponding storage part of the biasing coaxial part with a circumferential play in at least one circumferential direction in the rest state, and the biasing coaxial part The action of the elastic member in the - circumferential direction begins only when the circumferential play has been absorbed due to the angular deviation between the sleeve part and the biased coaxial part. so that

However, the stiffness of the effectively acting elastic means increases rapidly when the second group of elastic members begins to act, so for at least certain types of cars, when the accelerator pedal of the car is depressed, A noise called "block" occurs both when the vehicle is running and when it is stopped.

For example, when the pressure that had been applied to the accelerator pedal of an automatic cabin is temporarily released, both when the vehicle is running and when it is stopped, the coaxial part that is energized and the coaxial part that is energized are When the torque of 1iIIJ is reversed, a balancing effect occurs, whereby the energized coaxial part undergoes a very rapid return movement, and sometimes the energized coaxial part
At that time, due to the relatively low stiffness of the first group of elastic members acting solely on iC, it is sometimes subjected to a rebound movement.

This noise and balance effect occurs whether the elastic member used is a spring or a block of elastic material.

In order to minimize and, if possible, eliminate this disadvantage, according to the aforementioned French Patent Application No. 82-2034, the second group of elastic members to be acted upon is formed by blocks of elastic material, each block of elastic material having a protrusion. This protrusion is made to protrude circumferentially from the elastic material block in the circumferential direction under consideration, and the elastic material block is formed during angular deflection between the coaxial part to be biased and the circulation part to be biased. It has been suggested that Yoshi also act on this protrusion beforehand.

This has the advantageous result that the effect of the stiffness of the circumferentially acting elastic means is gradually developed.

For this purpose, a block of elastic material with a relatively short circumferential length is sufficient, so that
According to No. 2034, the free end of the elastic material protrusion, in the rest state of the device part, is the corresponding edge of the housing part of the biased coaxial part, which houses therein a block of elastic material with the elastic material protrusion. It is located at a distance from .

A general object of the invention is to use elastic material protrusions 'f! :(The purpose is to provide a configuration for advantageous use.

The invention more particularly comprises at least two coaxial parts, which coaxial parts have a predetermined resistance against elastic means or circumferentially acting elastic means circumferentially interposed therebetween. mounted so as to be rotatable relative to each other within the limits of the angular deviation of said circumferentially acting elastic means, said circumferentially acting elastic means comprising at least one block of elastic material, said block being a part of the device. extending approximately tangentially to the circumference, in part without circumferential play in the rest state of the device part;
A first of said coaxial parts is arranged in a recess formed therefor, and a portion of said coaxial part is arranged in a recess formed therefor, said part having at least a - circumferential clearance with a circumferential play in the idle state of said device part. The block is received in a recess formed therefor in a second coaxial part of the coaxial parts, and the block is
Screw-on vibration damping device of the type comprising at least one circumferentially projecting elastic material protrusion in the circumferential direction considered, the elastic material protrusion forming a housing for a second coaxial part. A screw vibration damping device, characterized in that the protrusion comes into contact with the corresponding radial edge of the parts, so that the protrusion begins to act as soon as an angular offset between the two coaxial parts is initiated. provide.

Thus, a protrusion made of elastic material has a relative stiffness that should act if the angular deviation between two coaxial parts is less than the torque to be transmitted between them, which is itself of a small value. A single elastic member with low elasticity is formed.

This provides two major advantages.

First, it is not necessary to use a specific elastic member with low stiffness, so if other conditions are the same, it is possible to free up a place to implant another elastic member with high stiffness, and to replace that elastic member with By minimizing the number of notches formed in the part a for storage, it is also possible to advantageously separate the coaxial part.

Also, since the elastic material itself exhibits large internal friction when it is crushed, and this internal friction is in any case considerably greater than the internal friction experienced by a simple spring under the same conditions, the angular deviation Special friction means, usually combined with elastic members of low stiffness, for the damping required for small values of force and torque? In addition, the elastic material protrusion according to the present invention actually acts in a slight Ic oblique direction on the radial edge of the housing portion of the biased coaxial portion housing the elastic material block having the elastic material protrusion. To do the same! The above-mentioned advantages are achieved because when the la portion is subjected to an angular deflection, it is relatively displaced and inevitably generates friction between the elastic material protrusion and the radial edge of the storage space. You can definitely reach history.

According to the configuration of the invention, the circumferential length of the elastic material protrusion is relatively large, and in any case the circumferential length of the elastic material protrusion shown in the aforementioned French Patent Application No. 82-2034 greater than length.

Therefore, the configuration of the present invention is not derived from this prior configuration.

Indeed, the problem is raised that the elastic member does not absorb or accept it while being crushed.

According to French Patent No. 82-2034, this problem is solved by combining a distribution-holding plate with an elastic material block around its elastic material protrusions, the cavities created thereby forcing the elastic material protrusions in the circumferential direction. The problem is solved by forming an annular cavity 1 between the distribution-holding plate and the elastic material projection, which is sufficient to absorb the elastic material projection when crushed.

This solution is satisfactory if the circumferential length of the elastic material protrusion is small, but not if this length is relatively large.

In fact, the useful area of the distribution-holding plate is thereby reduced to an unacceptable extent. This is the strength of the distribution-holding plate,
It is critical to efficacy and service life.

For this reason, blocks of elastic material having a relatively large circumferential length cannot normally be used.

According to a preferred embodiment of the invention, this problem is solved by providing a housing portion in the elastic material block for at least partially absorbing the protrusion made of elastic material when the protrusion is subjected to a circumferential crushing action. This problem can be solved very simply and effectively by providing the base portion of the elastic material protrusion.

In fact, the volume of the storage part takes into account that the elastic material protrusion can be at least partially absorbed in the space between the distribution-holding plate and the elastic material protrusion.

The elastic material protrusion can be set as soon as possible to completely absorb the elastic material block when subjected to a circumferential crushing action.

By making the depth of the storage portion sufficiently large according to the invention, the circumferential length of the elastic material protrusion can be set to a desired value without additionally reducing the size of the distribution-holding plate.

The features and advantages of the invention will become more apparent from the following description, taken in conjunction with the accompanying drawings, which illustrate preferred embodiments of the invention.

As shown in the figures, the torsion locking device according to the present invention is used, for example, in forming a hub-slow f# type friction clutch for an automobile.

In general, a torsional vibration damper as such has, as already mentioned, at least two coaxial parts A, 8, with elastic means C interposed circumferentially between them. (referred to as circumferentially acting elastic means) described in JfJA m), which are mounted so as to be rotatable relative to each other within a predetermined rotational angle. A coaxial portion A, 8 is provided.

The coaxial part A (actually the part to be energized) is, in the illustrated example, the hub 10 (for example with a key on its inner surface), a shaft, in fact a driven shaft, in the case of an automobile an input shaft of a transmission gear. A hub disc 11 (which is secured to the hub 10, for example by a force fit as shown) is provided.

The coaxial part B (which actually forms the biasing part) has in the example shown two guide washers 12;
and nine guide washers are arranged parallel to both 1b++ of the hub disk 11 at a distance, and are connected to each other by a spacer 13 such as a short shaft member.
3 is a notch 1 formed for this purpose on the outer periphery of the hub disk 11.
4 is loosely passed through.

In the case of a friction clutch for an automobile, the part B also has a friction disk 17, and the friction disk 17 has a disk 16 on the surface of one guide washer 12 on the hub disk 11 side.
It is fixed to said one guide washer 12 by the same spacer 13 which is glued by and fixes this guide washer 12 to the other guide washer 12 and has a friction lining 18 on both sides of the outer circumference, and has a friction lining 18 on both sides of the outer periphery, the shaft actually is tightened in the axial direction by a friction lining 18 between two plates that are rotationally integrated with the drive shaft, that is, the engine output port of the automobile.

According to the illustrated example, the disc 16 of the friction disc 17 is
The guide washer 12 is molded in one piece and extends radially over the entire surface of the guide washer 12 to which it is glued; however, as a variant, the disc 16 is divided into q number of plate pieces and the disc 16 is glued. These plate pieces may extend in the radial direction only in a part of the outer peripheral area of the guide washer 12.

In the following description, the latter configuration is often adopted in order to simplify the explanation.

According to the illustrated embodiment, the friction disk i of the hub disk 11
7 A bearing 2o is disposed on the side of the a++.
A radial collar 21, which is disposed between the inner circumferential surface of the guide washer 12 to which the guide washer 6 is bonded and the hub 10, and is integral with the bearing 2°, is arranged between the disc 16 of the friction disc 17 and the hub disc 11. inserted in the axial direction between them.

According to the illustrated embodiment, an axially acting washer 2 is provided between the hub disk 11 and the other guide washer 12.
2 is arranged, and the working washer 12 has an axial tongue 23
Rotatably integrated with the other guide washer 12,
Between the working washer 22 and said further guide washer 12 there is an axially elastic washer 25, for example a corrugated washer of the type shown, sold under the trade name "ONDUFLEX". inserted in the direction.

Since this configuration is known per se and does not fall within the scope of the invention, it will not be described in detail here.

The circumferentially acting elastic means interposed between the parts A and 8 has a plurality of elastic members, which will be described later, and these elastic members extend substantially tangentially to the circumference of the device. There is (
This configuration is common to each of the illustrated embodiments) and is distributed into separate groups with different stiffnesses.

The first group is blocks of elastic material 27.

In the illustrated example, there are two blocks 27, which are diametrically mirrored substantially opposite each other.

Each resilient material block 27 having a generally circular cross-sectional shape has a longitudinally flat surface 2 along each circumferential edge.
8, with a part in the recess formed for it in the coaxial part A (actually formed by the window 29A of the hub disk 11 into the coaxial part) and also in the coaxial part B. A portion is accommodated in each case in a storage section formed for this purpose (actually formed by the windows 29B of the two guide washers 12 of the coaxial section).

In the rest state of the device parts shown in FIGS.
The lens barrel is mounted within 9B without any play in the circumferential direction.

On the contrary, each block of elastic material is arranged in the corresponding window 29A of the hub disk 11 in the rest state of the device part with a circumferential clearance of at least a circumferential direction. .

According to the illustrated embodiment, such circumferential play exists in both circumferential directions. These are in the circumferential direction corresponding to the most common direction of rotation of the device parts (the circumferential direction corresponding to the forward movement of the vehicle, indicated by arrow F in Figure 1).
The clearance JT in the opposite direction, and the clearance JR in the opposite circumferential direction.

These two circumferential clearances JT measured as angles,
JR may be equal to each other.

However, in the illustrated example, the free play JT (extending in the circumferential direction corresponding to the most common direction of rotation of the device part, and also extending in the circumferential direction corresponding to the "tension" operation of the device part) The angle of ``JR'' extends in the opposite circumferential direction and actually corresponds to the ``return'' operation of the device part.
The angle is also large.

According to the illustrated embodiment, the elastic material block 27 is prevented from contacting and deteriorating the edge surfaces of the windows 29A, 29B in which it is housed, and the position of the block 27 within the windows 29A, 29B is prevented. In order to ensure that each circumferential end face of the block 27 is combined with a distribution-holding plate 30T, 30R, the distribution-holding plate 30T, 30R is connected to the circumferential end face and the window 29B of the guide washer 12. are interposed in the circumferential direction between the corresponding edge surfaces of.

The distribution-holding plates 30T, 30R, like the blocks of elastic material 27 which they cover on their circumferential end faces, have a virtually circular profile.

The distribution-holding plates 30T, 30R are elastic material blocks 27
The tongues 32 are arranged perpendicularly along the circumference and according to the flat surface 28 of the block of elastic material 27 so as to be approximately opposite to each other. It's bent.

The distribution-holding plates 30T, 30R may be adhesively secured to the resilient material block 27, if desired.

Since the distribution and holding plates 30T and 30R increase the length of the elastic material block 27 due to their thickness, the circumferential play JT,
JR is not from the free surface of the elastic material block 27,
Measured from the free surface of the distribution-holding plates 3QT and 30R.

Each elastic material block 27 used in this way is
As described in the aforementioned French Patent Application No. 82-2034, it is provided with at least one protrusion of elastic material projecting in the circumferential direction along the circumference.

According to the illustrated embodiment, a single projection of resilient material is provided circumferentially in each case, these being indicated by arrows F in FIG.
A protrusion 33T in the circumferential direction shown by , and a protrusion 33R in the opposite circumferential direction.

According to this embodiment, the elastic material protrusions 33T, 33R are
It is molded integrally with the elastic material block 27 carrying it, extends from the center area of the corresponding circumferential end face of the elastic material block 27, and is formed by a through hole 34 formed therefor in the center area of the distribution-holding plate 30T, 30R. , together with the annular clearance j of the swivel, pass through the distribution and holding plates 30T and 30R and project outward from them.

According to the present invention, the first
4, the elastic material protrusions 33T and 33R of each elastic material block 27 serve as storage areas for the coaxial portion A in which the elastic material block 27 is arranged. At the corresponding radial edge of the window portion 29A,
It is in contact with its free end.

According to the illustrated example, the elastic material protrusion 33T has a generally frustoconical outer contour and its free end is generally hemispherical.

On the contrary, in the embodiment of , the elastic material protrusion 33R, which is shorter than the elastic material protrusion 33T, is f'! , has a cylindrical outer contour and its free end is approximately frustoconical.

According to the invention, each elastic material block 27 is provided with a storage portion 35T, 35R at the root of its respective elastic material protrusion 33T, 33R.

According to the illustrated embodiment, the receiving portions 35T, 35R are grooves extending annularly around the elastic material protrusions 33T, 33R associated therewith.

In fact, the surface where the transverse dimension of the grooves 35T, 35R is at its maximum lies on the extension of the contour of the through hole 34 of the corresponding distribution-holding plate 30T, 30R, and its transverse dimension is at its minimum. The surface has a concave shape extending from the outer surface of the related projections 33T and 33R, and the bottom surface of the groove 35T135R has a rounded shape in the transverse direction, for example, a semicircle.

Thus, in the illustrated example, at least one side of the small diameter of groove 35T is generally frustoconical.

Also, as is easily understood, each elastic material protrusion 3
The length of 3T and 33R is the groove 35T13 surrounding them.
The root portions of the elastic material protrusions 33T and 33R connected to the elastic material block 27 are enlarged by a depth of 5R, and are carried over in the circumferential direction by that amount.

In the illustrated example, the length of the elastic material protrusion 33T in the circumferential direction is greater than the length of the elastic material protrusion 33R associated therewith.

According to the present invention, the grooves 35T, 35R surrounding the elastic material protrusions 33T, 33R at least partially displace the elastic material protrusions 33T, 33R as described below when the elastic material protrusions 33T, 33R are subjected to a crushing action. It can be accepted or absorbed.

Preferably, the volume of the grooves 35T, 35R is such that the elastic material projections 3 at the through holes 34 of the distribution-retaining plates 30T, 30R
Due to the clearance j formed in the turns of 3T and 33R, the elastic material protrusions 33T and 33R and the corresponding distribution-holding plate 30T,
30R, an elastic material protrusion 33T is provided in the volume formed between the
, 33R are at least partially absorbed, the elastic material protrusions 33T, by which the grooves 35T, 35R are surrounded when the elastic material protrusions 33T, 33R are subjected to a crushing action in the circumferential direction; It is determined to be sufficient to completely absorb 33R.

According to the embodiment shown in FIGS. 1 to 4, the elastic material protrusions 33T, 33R of each elastic material block 27 can be applied without prestressing to the -Heb disk 11 in the rest state of the device part. The elastic material protrusion having the larger circumferential length (i.e.,
35 elastic material protrusions) are one elastic material block 27
It extends in the same circumferential direction from one block to the next block.

The elastic member forming the circumferentially acting elastic means interposed between the coaxial parts A, 8 also comprises a spring 37 of the helical spring type in the illustrated example.

In the illustrated example, two springs 37 are used, which are arranged approximately diametrically opposite each other.

Each spring 37, as well as the elastic material block 27, partially extends into the recess formed for it in the coaxial part ^ (actually in the window of the hub disk 11 of the coaxial part A) in the rest state of the device part. 39A), together with the circumferential play pjlJ'T, and partly in the said rest state of the device part, in the storage part (actually formed by the coaxial part 8) formed for that purpose in the coaxial part 8. B) without circumferential play in the guide washer 12 (formed by the window 39B of the guide washer 12).

The circumferential play J' thus combined with the spring 37
T, J'R, when expressed as an angle, is also larger than the play JT, 'R associated with the elastic material block 27.

In particular, the stiffness of the spring 37 and the stiffness of the elastic material block 27 are also large.

Next, the operation will be explained. In the direction of rotation of the device part shown by the arrow F in FIG. Taking into account the circumferential length that the elastic material protrusions 33T have according to the invention, only these protrusions 33T are initially immediately active and elastically deflected during the first actuation phase.

The first stage of operation with the diagram of FIG. , B), the elastic material protrusion 33
It is expressed by the slope linear @l which is proportional to the stiffness of T.

As the resilient material protrusion 33T flexes elastically under the circumferential squeezing action, it is absorbed by the groove 35T that thereby surrounds the protrusion 33T according to the invention (FIG. 5A).

In other words, due to the circumferential crushing, an annular cavity is clearly added to the groove, which is based on the play j where the elastic material protrusion 33T passes through the corresponding distribution-holding plate 30T. Accordingly, the radial bulge that the elastic material protrusion 33T undergoes can freely develop without fear of deterioration.

This first operating phase is such that, at an angular deflection value of 01, which corresponds to the fact that the circumferential play is taken up, the distribution-holding plate 30T associated with the elastic material block 27 (FIG. 5B) until contact is made with the corresponding radial edge surface of the window 29A (the elastic material 10 27 is housed within the window 29A).

From that moment on, the elastic material block 27 begins to act, and during the second actuation phase initiated thereby, the elastic material protrusion 3
Elastically applies its own effect to the three guns (in the compressed state). In the diagram of FIG. 6, the part representing this second operating stage is the direct @! 0 is a straight line with a slope greater than the slope (proportional to the stiffness of the device part) At D2, the spring 37 begins to act and the elastic material block 27 and the elastic material protrusion 33
Adding the self effect to the effect of T (in compression) initiates the third operating phase. In the diagram of Figure 6,
The part representing the sixth operating stage is drawn by a straight line 2 with a greater slope (proportional to the stiffness of the device part) than the straight line B.

This third actuation phase continues until the energized coaxial part is driven directly by the energized coaxial part B at the angular deflection value D3.

At this time, at least some turns of the spring 37 are in contact with each other, and the spacer 13 is passing through.
It will come into contact with the corresponding edge surface of the notch 14 of the disc 11.

In the case of the return operation of the device part, the torque between the coaxial parts A and B is reversed, and after the coaxial part B, which is biased by the biased coaxial part, also undergoes a rotational movement, as in the case described above. A similar process occurs. However, at this time, it is of course the elastic material protrusion 33R that begins to act.

Thus, according to the present invention, the elastic material protrusions 33T, 3
3R by itself forms a low stiffness elastic means circumferentially interposed between the coaxial portions ^, B.

Therefore, there is no need to use special springs to form elastic means with low stiffness.

In order to better illustrate this advantage, in FIG. 1 a housing part, which is normally used to house a spring forming a low stiffness elastic means, is shown in broken lines and indicated by the reference numeral 40.

Such a predetermined open storage part can advantageously be used to accommodate a stiffer spring that begins to act together with or after the spring 37.

As a variant, these storage parts may be discarded for the sake of coaxial parts A and B.

In the above description, the torque transmitted between the coaxial parts A and B in the process of increasing the angular deflection between the coaxial parts A and B, and the torque transmitted between them in the process of decreasing the deflection. The well-known phenomenon of hysteresis, which is based on the friction between the coaxial parts and the torque B, which leads to a difference between the torques B and B, has not been specifically considered for the sake of simplicity.

At least for the elastic material protrusions 33T, 33H, this near-torque friction is due in the illustrated embodiment to the friction washer 24 and the friction ring 25 acting on the friction ring 24.

However, according to a variant embodiment of the invention not shown, this friction washer 24 and therefore also the friction washer 25 can be omitted. Window portion 29A of nopu disc 11 (
It is taken into account that the mechanical friction of the free ends of the elastic material protrusions 33T, 33R against the corresponding edges of the elastic material block 27 with the elastic material protrusions 33T, 33R is arranged in this window. If so, the elastic material protrusions 33T, 3
Internal friction due only to 3R is sufficient in this case.

This configuration ensures that the friction generated in this way does not become excessive and that at small torque values between the coaxial portions A and B, the elastic means with low stiffness that begins to act in the circumferential direction may be ignored. It is especially preferred that the amount of water used is small (in the case of friction washers, this risk does not exist).

Leave the friction washer 24 and attach the elastic material protrusion 33T.
, 33R (in this example, one or both of the elastic material block 27 and the spring 37) may be configured so that the friction washer 24 can act simultaneously.

This configuration is well known per se and will not be described in detail here.

According to the variant embodiment shown in FIG. 7, in the rest state of the device part, at least the elastic material protrusions 33T are under prestress (preload), and the two elastic material blocks having these protrusions are 27, the phase is reversed from one side to the other. That is, the elastic material protrusion 33T is one protrusion 3
37) to the next protrusion 33T, extending in opposite directions in the circumferential direction.

The present invention is not limited to the configuration described above, and can be implemented with various other changes.

In particular, as described in the aforementioned French Patent Application No. 82-2054, the at least one elastic material protrusion does not necessarily have to be integrally molded with the elastic material comprising them.

Furthermore, the accommodation portion provided according to the invention for absorbing the elastic material projection when it is subjected to a circumferential crushing action is not necessarily an annular groove.

This groove may only partially surround the elastic material protrusion associated with it, or it may extend diametrically, for example on both sides thereof.

The present invention provides not only a torsional vibration damping device that has only two coaxial parts that are rotatably mounted relative to each other, but also a torsional vibration damper that has a large number of coaxial parts that are rotatably mounted relative to each other. The same applies to locking devices.

Furthermore, the present invention is applicable not only to single-plate friction clutches, but also to
It is generally applied to any kind of screw vibration damping device.

[Brief explanation of the drawing]

FIG. 1 is a partial side view of a torsional vibration damping device according to the present invention, as seen in the direction of arrow l in FIG. ■A sectional view in the axial direction along six lines; Figure 3 is a detailed view showing the area surrounded by the dashed-dotted line frame ■ in Figure 1 on an enlarged scale; Figure 4 shows the torsional vibration damping device according to the present invention. 5A and 5B are partial circumferential sections along the line IV--IV of FIG. 1, shown in the flattened state; FIGS. FIG. 6 is a diagram for explaining the operation, and FIG. 7 is a partial elevational view similar to FIG. 1 showing a modified embodiment of the present invention. Explanation of symbols 27...Elastic material block, 29^, 29B...Storage portion, 33T, 33R...Elastic material protrusion, A, 8.
...Coaxial part.

Claims (9)

[Claims] (1) has at least two coaxial parts (A, 8);
These coaxial parts are mounted so as to be rotatable relative to each other within a predetermined angular deviation limit against elastic means circumferentially interposed therebetween, i.e., circumferentially acting elastic means. and the circumferentially acting elastic means has at least one
two blocks of elastic material C27) extending approximately tangentially to the circumference of the device part, some of which are free from circumferential play in the rest state of the device part. , a first coaxial portion (B) of the coaxial portions;
is arranged in a storage part (29B) formed for that purpose, and in part, with respect to at least a - circumferential direction, the second of said coaxial parts with a circumferential play in the rest state of the device part. The block (27A) is housed in a storage part (29A) formed therefor in the coaxial part (A).
) is a screw 9 vibration damping device having at least one elastic material protrusion (33 pieces, 33R) protruding on the circumference in the considered circumferential direction; portions (33T, 33R) are in contact with the corresponding radial edges of the storage portion (29A) of the second coaxial portion (A), thereby preventing the angular deviation between the two sympathetic portions (A, 8). The screw D! is characterized in that the protrusions (33 teeth, 33R) start acting immediately when the process starts. Locking device. (2) A storage portion (35 pieces, 35R) for at least partially absorbing the elastic material protrusions (33T, 33R) when the elastic material protrusions (33T, 33R) are subjected to a crushing action in the circumferential direction.
) at the base of the elastic material projections (33 teeth, 33R) of the elastic material block (27). (3) The distribution-holding plate (3) combined with the elastic material block (27) at the turn of the elastic material projections (33T, 33R)
0T, 30R) and the protrusion (33, 33R), taking into account that the protrusion (33, 33R) will be at least partially absorbed, Department (33-cho,
The storage portions (35T, 33R) are designed so that the storage portions (35T, 35R) can completely absorb the projections (33T, 33R) when the projections (33T, 33R) are subjected to a circumferential crushing action.
The screw vibration damping device according to claim 2, characterized in that a volume of 5R) is determined. (4) Connect the storage part (35 guns, 35R) to the elastic material protrusion (3
The screw vibration damping device according to claim 2 or 3, characterized in that the screw screws (3T, 33R) are provided with annularly extending grooves. (5) Torsional vibration according to claim 4, characterized in that the surface of the minimum cross-sectional area of the storage portion (35T, 35R) is on an extension of the outer surface of the elastic material protrusion (33T, 33R). Stopping device. (6) The screw vibration damping device according to claim 4 or 5, characterized in that at least one side surface of the storage portion (35 pieces, 35R) is approximately truncated conical. (7) The elastic material protrusion (33 pieces, 33R) passes through the distribution-holding plate (30 pieces, 30R) with play through the through hole (34) of the distribution-holding plate (30T, 30R). A screw vibration damping device according to any one of claims 2 to 6, wherein the surface of the elastic material protrusion (33T, 33R) with the maximum cross-sectional area is the distribution-holding plate (30T, 30R). A screw-type motion stop device, characterized in that it is located on an extension of the outline of the through hole (34). (8) The elastic material protrusion (33 teeth, 33R) is molded integrally with the elastic material Glock (27) having the same. Screw stopper device. (9) The screw vibration damping device according to any one of claims 1 to 8, characterized in that the elastic material protrusions (33T, 33R) are subjected to prestress when the device portion is at rest. U [An elastic material protrusion (27) having two elastic material blocks (27) spaced apart from each other in the circumferential direction and working together with each other (
33 guns, 33R) are in reverse phase, and the elastic material protrusions (33T,
10. The screw vibration damping device according to claim 9, wherein the screw threads 33R) extend in opposite circumferential directions. aυ Elastic material blocks (27) are arranged one in each circumferential direction.
The torsional vibration damping device according to any one of claims 1 to 10, characterized in that it has two elastic material protrusions (33 teeth, 33R) i.